Cam-shaft mounting for internal-combustion engines



J. F. BUCKINGHAM. CAM SHAFT MOUNTING FOR INTERNAL COMBUSTION'ENGINES.

APPLICATION FILED A'UG.3I| 1920.

1,418,282. PatentedJl-me 6,1922.

2 SHEETS-SHEET I- J. F. BUCKINGHAM.

CAM SHAFT MOUNTING FO-R INTERNAL COMBUSTION ENGINES.

' APPLICATION FILED A'UG. 3.1. 1920.

1,418,282.. Patenwairune 6,1922.

2 SHEETSSHEET 2.

III

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TENT DFFICE'.

JAMES FRANK BUCKINGHAM, OF COVENTRY, ENGLAND.

CAM-SHAFT MOUNTING FOR INTERNAL-COMBUSTION ENGINES.

Specification of- Letters Patent.

Patented June 6, 1922.

Application filed August 31, 1920. Serial No. 407,230.

T 0 all whom it may concern:

Be it known that I, JAMES FRANK BUCK- INGHAM, a subject of the King ofEngland, residing at Coventry, in the county of VVarwick, England, haveinvented certain new and useful Improvements in Cam-Shaft Mountings forInternal-CoInbustion Engines, of which the following is a specification.

This invention relates to cam-shaft mountings for internal combustionengines and has for its object to provide means whereby the shaft .canbe removed and replaced radially as regards the crankshaft withoutdismantling the crankcase.

According to this invention, a slot is formed in one wall of the case topermit the passage therethrough of the shaft with its timing gear andthe ends of the shaft are carried in bearings on caps which project intothe case. The shaft is thus shorter than the distance between the endwalls of the case and when the caps have been withdrawn endwise theshaft can be lifted out through the slot, which is normally covered by aplate.

. In the accompanying drawings,

Figure 1 is a plan view of a crankcase for a V type twin cylinderengine, and

Figure 2 is a central vertical section of the same showing the shafts,etc, in place.

Like letters indicate like parts throughout the drawings.

The crankcase shown comprises a cup A with faces A to which thecylinders are attached over the apertures Z and a hollow stem B, whilstat the opposite end is an aperture C closed by a cover plate D carryingthe starting handle H. The stem B contains the outer bearing E for thecrankshaft E, G, K and the inner bearing E is supported by the web A ofthe case.

On the crankshaft is fixed the gear wheel L by means of a peg L thiswheel meshing with the gear M lying in the space between the web A andthe outer wall A of the crankcase. The cam-shaft F carries the gear M,and its bearings F are mounted in flanged caps N at the ends, both ofwhich are supported on the cup portion of the crankcase.

These caps N are attached to the walls in any suitable manner and eachprojects inwards beyond the wall of the case, forming cylindricalbearing housings.

In the top of the case is a T shaped slot A provided with acorrespondingly shaped cover 0. WVhen this and the caps N are removed,the shaft F and gear M can be lifted out of place and re-fitted radiallyas regards the crankshaft without any difficulty in meshing the timinggears L and M. 4

The ends of the shaft may drive, as through dog clutches F variousaccessories, such as an ignition device and oil pump (not shown),carried by the walls of the crankcase.

Parts of the connecting rods are shown at J running on roller bearings J2 separated by washers d of which the outer one is fixed by the bolt KlVhat I claim as my invention and desire to secure by Letters Patent ofthe United States is 1. In an internal combustion engine, a crank case,a crank shaft mounted in bearlngs therein, end walls to said crank case,endwise movable bearing housings carried by each. end wall andprojecting within said crank case, a cam shaft mounted in said bearinghousings and shorter than the distance between said end walls, and aslot in the side of said crank case through which said cam shaft can befitted and removed radially as regards said crank shaft substantially asset forth.

2. In an internal combustion engine as claimed in claim 1, thecombination with the cam shaft of a ball hearing at each end thereof andflanged caps attached to the crank case wall by their flanges and havinghousing portions which project into the crank case and carry the ballbearings, substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JAMES FRANK BUCKINGHAM.

Witnesses:

ALBERT BROWN, ANNIE L. WADE.

